Latisha Fisher at her sentencing at New York Supreme Court on Nov. 20, 2017.

A paranoid schizophrenic woman who smothered her toddler in a Midtown burger joint and claimed “the devil made me do it” will spend nearly two decades in prison.

Latisha Fisher, 38, on Monday was sentenced to 18 years in prison for the killing of 20-month-old Gavriel Ortiz-Fisher in March 2015. She spent 40 minutes in the 5 Boro Burger bathroom smothering him, officials said.

Fisher struck a deal with prosecutors and pleaded guilty to manslaughter on Oct. 30.

Wearing beige prison garb with a light pink sweater underneath, she appeared somber as she sat alongside her legal team.

Judge Gregory Carro noted Fisher, who has been diagnosed with schizophrenia, “clearly suffering mental illness (and) has taken responsibility for her actions.”

After the sentencing, Ortiz Jr. and Sr. said they finally felt they had some closure.

“Hanging in there, entirely, step by step, day by day,” the child’s father said.

Ortiz Jr., who also has a 1-year-old son and a 17-year-old daughter, told reporters he still feels immense guilt over the day his son was killed and feels he could have prevented the murder had he taken Fisher up on an invitation to join them that fateful day.

“She owned up to what she did. That’s the only thing I always wanted,” Ortiz Sr. added.

Fisher’s attorney, Bryan Konoski, said had his client decided to proceed to trial on the issue of mental illness, it could have resulted in a life sentence. The resolution of manslaughter gives Fisher an 18-year sentence with credit for time she’s already served.